OWC 128GB (2x64GB) DDR4 2933 CL21 2Rx4 ECC RDIMM memory upgrade

Server Memory Kit

This OWC upgrade kit delivers 128GB of DDR4 ECC registered memory across two 64GB modules. It is built for HP Cloudline CL2600 Gen10, CL3100 Gen10, CL4100 Gen10 and CL5800 Gen10 servers. The modules run at 2933MHz with CL21 latency and 1.2V operation. This memory is not compatible with standard desktop computers or unbuffered configurations.

Thermals and Power

Each module operates at the standard DDR4 voltage of 1.2V, keeping power draw predictable in dense server configurations. No heat spreaders are fitted, so airflow through the chassis manages thermals directly. Registered buffering adds minimal latency while maintaining signal integrity across fully populated channels. Backward compatibility with 2133MHz, 2400MHz and 2666MHz systems allows flexible deployment.

Compatibility and Replacement

The kit replaces multiple HP part numbers including P19045-K21, P00930-H21 and P14636-001 for straightforward procurement. ECC registered architecture prevents data corruption in critical workloads but cannot be mixed with load-reduced or unbuffered DIMMs. Buyers who need consumer desktop memory or non-ECC modules should look elsewhere. JEDEC and RoHS compliance ensures broad platform acceptance.